Surely if the offer 2 is 25% extra free, then the price is still the same at £1.20?

or is it £1.51, which then suggests that its not free?

Any help appreciated

Feb 20th 2011, 03:34 PM

emakarov

Under offer (2), you get 1.25 litres for £1.20, or £0.96 per litre.

Feb 20th 2011, 03:55 PM

e^(i*pi)

The price will be the same in real life but here the question asks the price per litre. In other words you'll need to work out the new volume, then divide the price (which is the same) by the new volume

(Interestingly it turns out that offer 1 gives you 90p per litre thus making it the better offer)

edit: because I'm bored the equilibrium point (when the two offers are equal in price per litre is 18.03%) - this falls well outside the scope of your question as does everything in red

Feb 20th 2011, 04:04 PM

David Green

Thanks for that information, much appreciated

David

Feb 21st 2011, 12:33 PM

David Green

Quote:

Originally Posted by e^(i*pi)

The price will be the same in real life but here the question asks the price per litre. In other words you'll need to work out the new volume, then divide the price (which is the same) by the new volume